Cheapest Transactional Email software
8 products with sourced pricing and capability data, 7 with a free plan. Entry paid plans median $17.48/mo. Pick the one you pay for today to find a cheaper replacement.
Read the guide: Cheapest SendGrid alternatives at 1,000 emails/month →
Same job. Way less money.
Transactional Email price ladder
Every product's entry point, cheapest first: the free plan if there is one, otherwise the lowest paid plan as a monthly equivalent (yearly-billed plans divided by 12). Prices as observed on official pricing pages.
| Product | Free plan | Paid from | Plan | Verified |
|---|---|---|---|---|
| MailerSendemail api | Free | $7/mo | Hobby | 2026-10-26 |
| SMTP2GOemail api | Free | $10/mo | Starter | 2026-10-26 |
| Mailgunemail api | Free | $15/mo | Basic | 2026-10-26 |
| Postmarkemail api | Free | $15/mo | Basic | 2026-10-26 |
| Twilio SendGridemail api | — | $19.95/mo | Essentials | 2026-10-28 |
| Resendemail api | Free | $20/mo | Pro | 2026-10-26 |
| Loopsalso fits here | Free | $49/mo | Growth | 2026-10-28 |
| Amazon SESemail api | Free | $105/mo | Pro | 2026-10-26 |
Cheapest transactional email tool for each capability
For every capability at least a third of these products support: the cheapest product that covers it, free plans counted at $0.
- Need custom sending/tracking domain?
- Mailgun — free plan
- Need dedicated IP, transactional email API, dedicated IP or 2 other capabilities?
- Amazon SES — free plan
- Need email templates?
- Loops — free plan
- Need delivery analytics?
- Postmark — free plan
- Need deliverability SLA / support, SMTP & REST API, email templates or event webhooks?
- MailerSend — free plan
Frequently asked
What is the cheapest transactional email software?
MailerSend has the lowest paid entry price we have sourced, from $7/mo (Hobby plan). 7 of the 8 products also offer a free plan.
Which transactional email tools have a free plan?
7 of the 8 we track: Amazon SES, Loops, MailerSend, Mailgun, Postmark, Resend, SMTP2GO. Free plans carry limits; each product page lists them.
How much does transactional email software cost?
Paid entry plans in our data run from $7/mo to $105/mo, with a median of $17.48/mo across 8 priced products (monthly equivalents; yearly-billed plans divided by 12).
Which transactional email tool is cheapest with custom domain?
Mailgun, free plan.
Which transactional email tool is cheapest with dedicated ip, transactional api and 3 other capabilities?
Amazon SES, free plan.
When were these prices checked?
Between 2026-10-26 and 2026-10-28, on the vendors' official pricing pages.